FF-B-185
September 10, 1956
SUPERSEDING
Int. Fed. Spec. FF-B-00135 (DOD-SHIPS)
October 18, 1954
Fed. Spec. FF-B-186 (in part)
August 13, 1941
FEDERAL SPECIFICATION
BEARINGS, ROLLER, CYLINDRICAL;
AND BEARINGS, ROLLER, SELF-ALIGNING
This specification was approved by the Commission, Federal Supply Services,
General Services Administration, for the use of all Federal agencies.
1. SCOPE AND CLASSIFICATION
1.1 Scope.--This specification covers cylindrical and self-aligning roller
bearings for general purpose use.
1.1.1 Federal Specification coverage.--Federal specifications do not
include all classes and types of the commodity indicated by the titles of the
specification, but are intended to cover only those most generally used by
the Federal Government.
1.2 Classification.
1.2.1 Grade.--Roller bearings shall be of but one grade, standard.
1.2.2 Classes and types.--Roller bearings .shall be of the following
classes and types, as specified (see 6.2):
Class 1.--Radial, cylindrical, nonlocating, single row of rollers (metric
bore and o.d., inch or metric width).
Type 211.--Two-lip inner ring, cylindrical outer ring with two roller
retainment rings (table II).
Type 212.--Two-lip inner ring, cylindrical outer ring (table III).
Type 214.--Cylindrical inner ring and outer ring with two roller retainment
rings on outer ring (table IV).
Type 215.--Cylindrical inner ring two-lip outer ring (table V).
Type 216.--Cylindrical inner ring, one-lip outer ring (table VI).
Class 2.--Radial, cylindrical, one direction locating, single row of rollers
(metric bore and o.d., inch or metric width).
Type 231.--Two-lip inner ring one-lip outer ring (table VII).
Type 232.--Two-lip inner ring one-lip outer ring with one roller retainment
ring on outer ring (table VIII).
Type 234.--One lip inner ring - one-lip outer ring (table IX).
Type 236.--One lip inner ring - two-lip outer ring with one roller
retainment ring on inner ring (table X).
Class 3.--Radial, cylindrical, two direction locating, single row of rollers
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